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EXT_disjoint_timer_query: getQueryObjectEXT() method

The EXT_disjoint_timer_query.getQueryObjectEXT() method of the WebGL API returns the state of a query object.

Syntax

js

getQueryObjectEXT(query, pname)

Parameters

query

A WebGLQuery object from which to return information.

pname

A GLenum specifying which information to return. Must be ext.QUERY_RESULT_EXT or ext.QUERY_RESULT_AVAILABLE_EXT.

Return value

Depends on pname:

  • If pname is ext.QUERY_RESULT_EXT: A GLuint64EXT containing the query result.
  • If pname is ext.QUERY_RESULT_AVAILABLE_EXT: A GLboolean indicating whether or not a query result is available.

Examples

js

const ext = gl.getExtension("EXT_disjoint_timer_query");
const query = ext.createQueryEXT();
ext.beginQueryEXT(ext.TIME_ELAPSED_EXT, query);

// Draw
ext.endQueryEXT(ext.TIME_ELAPSED_EXT);

// At some point in the future, after returning control to the browser
const available = ext.getQueryObjectEXT(query, ext.QUERY_RESULT_AVAILABLE_EXT);
const disjoint = gl.getParameter(ext.GPU_DISJOINT_EXT);

if (available && !disjoint) {
  // See how much time the rendering of the object took in nanoseconds.
  const timeElapsed = ext.getQueryObjectEXT(query, ext.QUERY_RESULT_EXT);
}

Specifications

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
getQueryObjectEXT
70Only supported on macOS.
47–65Removed due to the GLitch exploit.
79Only supported on macOS.
51–59Removed due to the GLitch exploit.
No
57Only supported on macOS.
34–52Removed due to the GLitch exploit.
No
47–65Removed due to the GLitch exploit.
47–65Removed due to the GLitch exploit.
No
34–47Removed due to the GLitch exploit.
No
5.0–9.0Removed due to the GLitch exploit.

See also

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/EXT_disjoint_timer_query/getQueryObjectEXT